Heater and baffle for the induction pipes of internal-combustion engines



L. COATALEN AND J. S. IRVING. HEATER AND BAFFLE FOR THE INDUCTION PIPES OF INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JUNE 2I, 1 920- 2 SHEETS-SHEET I- Patented Mar. 7, 1922.

INT/M10185: m @o-aIaZ T, I

L. COATALEN AND I. S. IRVING.

THE INDUCTION PIPES OF INTERNAL COMBUSTION ENGINES.

HEAT ER AND BAFFLE FOR APPLICATION FILED lUNE ZII I920- l,408,56 2. Patented Mar- 7, 1922.

2 SHEETS-SHEET 2- INTAKE MAN/FOL D WA TEE PUME CA "PB URE 7'0 Ifiuentors: Louis Cowtalen,% E7272, 6'. Inning,

UNITED STATES PATENT OFFICE.

LOUIS COATALEN AND JOHN SAMUEL IRVING, OF WOLVERHAMPTON, ENGLAND, ASSIGNQRS 0F ONE-HALF TO SUNBEAM MOTOR CAR COMPANY, LIMITED, OF

WOLVERHAMPTON, ENGLAND.

HEATER AN D BAIFFLE FOR THE INDUCTION PIPES OF IN'TERNAL-COIE'BUSTION ENGINES.

To all whom it may concern:

Be it known that we, LoUIs COATALEN and JOHN SAMUEL Invmo, both subjects of the King of England, and residing at \Volverhampton, in the county of Stafi ord, England, have invented certain new and useful Improvements in Heaters and Baflies for the Induction Pipes of Internal Combustion Engines, of which the following is a specification.

This invention has for its object to provide an improved combined heater for the mixture of internal combustion engines and battle which will prevent the emission of flame from the carburettor, when firing back along the induction pipe, its particular features being that it does not restrict the gas passage and that the heating effect can be adjusted in a simple manner.

According to this invention a jacketed ring forms part of the induction pipe, and the wallof this ring is divided into two segmental chambers communicating with the spaces between the tubes of a stack which lies in the inlet pipe. The mixture from the carburettor passes through the tubes and the heating medium passes from the one chamher, through the spaces between the tubes and out to the other ring chamber.

The ring may be much shorter than the stack of tubes and the length of the latter can be varied without altering the ring, in order to vary the effect.

In the accompanying drawings,

Figure 1 is a plan of a convenient construction and Figure 2 is a side elevation, half in section, of the same.

Fig. 3 is a diagrammatic view of an automobile engine equipped with our device.

Like letters indicate like parts throughout the drawings. I

In this construction, the ring A is provided with circular flanges A and A at the top and bottom, whereby it is bolted or clamped between parts of'the induction pipe (not shown), thereby forming a short length of the wall of the latter. This ring is cast hollow at two sides preferably opposite to one another, so as to form a pair of crescentshaped chambers B and C, each extending about 120 around the ring, with walls D about 60 in length between the adjacent Specification of Letters Patent.

Application field June 21,

Patented Mar. '7, 1922.

1920. Serial No. 390,602.

ends. Each chamber B and C is cast with a hollow boss B and C for the attachment of a pipe conveying the heating medium to and from the chambers.

Holes E are formed in the inner periphery A of the ring for the passage of the heating medium, which is preferably hot water.

Fitted within the ring is a sleeve F, preferably much longer than the depth of the ringv A, and this sleeve contains a stack of tubes G, the ends of which are open. The tubes lie parallel to the axis of the ring and sleeve, and the ends of the spaces H between them are closed, as by using tubes with flared ends and dipping the stack in solder in the well known Way common in radiator construction.

At suitable points in the sleeve F holes F are formed in it, to correspond and register with the holes E in the inner wall A of the ring.

The presence of the stack of tubes G in the induction pipe constitutes an efiicient battle which prevents the passage of flame from the engine to the carburettor, and hot water admitted to one side of the ring will flow through the holes E and F and fill all the spaces H between the tubes, heating the mixture as is required. By controlling the flow of hot water this heating effect can be adjusted over a wide range, as is often required for engines operating upon aircraft.

The range of this heating effect can easily be altered by changing the sleeve F and stack of tubes for another of different length without changing the ring A. As the ring itself is short it can be fitted between a pair of flanges upon existing engines without altering very much the position of existing parts.

What we claim as our invention and desire to secure by Letters Patent of the -United States is 1. A battle and heater for insertion in the induction pipe of an internal combustion engine, comprising astack of tubes spaced apart and united to one another at their ends, a sleeve enclosing said stack and united at its ends to the ends thereof, a ring surrounding said sleeve and adapted to be united with, and to form part of said induction pipe, chambers provided in the wall of said ring, one on each side thereof, a passage extending inwardly from each chamber through said sleeve into the space between said tubes, and a passage extending outwardly from each chamber to the exterior of said ring, substantially as set forth.

2. A bafiie and heater for insertion in the induction pipe of an internal combustion engine, comprising a stack of tubes spaced apart and united to one another at their ends, a sleeve enclosing said stack and united at its ends to the ends thereof, adapted to extend along the interior of said induction pipe, a ring surrounding said sleeve and shorter axially than it, adapted to be united with, and to form part of said induction pipe, chambers provided in the wall of said ring, one on each side thereof, a passage extending inwardly from each chamber through said sleeve into the space between said tubes, and a passage extending outwardly from each chamber to the exterior of said ring, 

